TIDUEB2A
July 2022 – July 2022
Description
Resources
Features
Applications
5
1
System Description
2
System Overview
2.1
Block Diagram
2.2
Design Considerations
2.2.1
Power Multiplexing Circuit Design Parameters
2.2.2
Input Connections and Filter
2.2.3
Reverse Polarity Protection
2.2.4
Battery Charger Input
2.2.5
Battery Ideal Diode-OR
2.2.6
Input and Battery Switchover Mechanics
2.2.7
LM74800 (U1) HGATE
2.2.8
Battery LM74800 HGATE
2.2.9
BQ25731 Design Considerations
2.2.10
BQ25731 Component Selection
2.2.11
ILIM Circuit
2.2.12
MCU and I2C Bus Design Considerations
2.2.13
MSP430FR2475
2.2.14
I2C Bus Overview
2.2.15
MSP430 Connectors
2.2.16
MSP430 Power Supply
2.2.17
Sensing Circuits
2.2.18
Current Sensing
2.2.19
Voltage Sensing
2.2.20
Input Comparators
2.2.21
Software Flow Chart
2.3
Highlighted Products
2.3.1
BQ25731
2.3.2
LM7480-Q1
2.3.3
LM74700-Q1
2.3.4
MSP430FR2475
2.3.5
PCA9546A
3
Hardware, Testing Requirements, and Test Results
3.1
Hardware Requirements
3.2
Test Setup
3.3
Test Results
3.3.1
Adaptive Charge Current Limiting
3.3.2
Battery ORing System
3.3.3
Circuit Switchover From Adapter to Battery
4
Design and Documentation Support
4.1
Design Files
4.1.1
Schematics
4.1.2
BOM
4.2
Documentation Support
4.3
Support Resources
4.4
Trademarks
5
Revision History
4.1
Design Files